./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:32:19,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:32:19,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:32:19,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:32:19,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:32:19,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:32:19,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:32:19,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:32:19,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:32:19,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:32:19,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:32:19,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:32:19,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:32:19,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:32:19,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:32:19,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:32:19,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:32:19,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:32:19,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:32:19,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:32:19,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:32:19,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:32:19,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:32:19,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:32:19,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:32:19,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:32:19,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:32:19,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:32:19,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:32:19,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:32:19,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:32:19,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:32:19,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:32:19,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:32:19,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:32:19,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:32:19,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:32:19,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:32:19,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:32:19,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:32:19,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:32:19,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 00:32:19,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:32:19,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:32:19,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:32:19,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:32:19,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:32:19,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:32:19,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:32:19,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:32:19,444 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:32:19,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:32:19,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 00:32:19,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:32:19,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:32:19,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:32:19,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:32:19,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:32:19,446 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:32:19,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:32:19,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:32:19,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:32:19,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:32:19,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:32:19,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:32:19,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:32:19,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:32:19,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 00:32:19,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 00:32:19,449 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:32:19,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:32:19,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:32:19,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:32:19,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab [2021-12-18 00:32:19,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:32:19,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:32:19,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:32:19,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:32:19,687 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:32:19,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2021-12-18 00:32:19,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9f6889a/5ebe8149c3c344059aa002684899584b/FLAG5dcb4ab6b [2021-12-18 00:32:20,460 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:32:20,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2021-12-18 00:32:20,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9f6889a/5ebe8149c3c344059aa002684899584b/FLAG5dcb4ab6b [2021-12-18 00:32:20,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9f6889a/5ebe8149c3c344059aa002684899584b [2021-12-18 00:32:20,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:32:20,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:32:20,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:32:20,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:32:20,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:32:20,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:32:20" (1/1) ... [2021-12-18 00:32:20,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ddd8636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:20, skipping insertion in model container [2021-12-18 00:32:20,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:32:20" (1/1) ... [2021-12-18 00:32:20,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:32:20,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:32:21,187 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2021-12-18 00:32:21,195 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2021-12-18 00:32:21,932 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,932 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,933 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,934 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,935 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,954 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,956 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,956 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,958 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,958 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,959 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:21,959 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,234 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:32:22,235 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:32:22,236 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:32:22,237 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:32:22,238 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:32:22,238 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:32:22,239 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:32:22,240 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:32:22,240 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:32:22,241 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:32:22,441 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:32:22,744 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,789 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,790 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,793 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,793 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:32:22,860 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:32:22,880 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2021-12-18 00:32:22,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2021-12-18 00:32:22,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,939 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,939 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,946 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:22,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:32:22,971 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:32:22,972 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:32:22,972 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:32:22,973 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:32:22,973 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:32:22,973 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:32:22,974 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:32:22,974 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:32:22,975 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:32:22,996 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:32:23,065 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,065 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,089 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,096 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,097 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,097 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,099 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,100 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,100 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,100 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:32:23,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:32:23,349 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:32:23,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23 WrapperNode [2021-12-18 00:32:23,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:32:23,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:32:23,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:32:23,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:32:23,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,537 INFO L137 Inliner]: procedures = 774, calls = 2446, calls flagged for inlining = 67, calls inlined = 11, statements flattened = 624 [2021-12-18 00:32:23,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:32:23,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:32:23,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:32:23,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:32:23,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:32:23,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:32:23,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:32:23,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:32:23,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (1/1) ... [2021-12-18 00:32:23,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:32:23,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:23,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 00:32:23,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 00:32:23,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-12-18 00:32:23,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 00:32:23,708 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-18 00:32:23,708 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-18 00:32:23,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:32:23,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:32:23,709 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-12-18 00:32:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-12-18 00:32:23,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:32:23,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:32:23,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:32:23,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:32:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:32:23,709 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-18 00:32:23,710 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-18 00:32:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-18 00:32:23,710 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-18 00:32:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 00:32:23,710 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 00:32:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:32:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-12-18 00:32:23,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-12-18 00:32:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:32:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-18 00:32:23,711 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-18 00:32:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 00:32:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-12-18 00:32:23,711 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-12-18 00:32:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:32:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_begin [2021-12-18 00:32:23,712 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_begin [2021-12-18 00:32:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-12-18 00:32:23,712 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-12-18 00:32:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2021-12-18 00:32:23,712 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2021-12-18 00:32:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:32:23,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:32:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2021-12-18 00:32:23,713 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2021-12-18 00:32:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-12-18 00:32:23,713 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-12-18 00:32:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:32:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-18 00:32:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-18 00:32:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-12-18 00:32:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-12-18 00:32:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 00:32:23,978 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:32:23,979 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:32:24,085 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !true; [2021-12-18 00:32:24,670 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:32:24,676 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:32:24,677 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-18 00:32:24,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:32:24 BoogieIcfgContainer [2021-12-18 00:32:24,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:32:24,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:32:24,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:32:24,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:32:24,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:32:20" (1/3) ... [2021-12-18 00:32:24,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143ea2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:32:24, skipping insertion in model container [2021-12-18 00:32:24,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:32:23" (2/3) ... [2021-12-18 00:32:24,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143ea2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:32:24, skipping insertion in model container [2021-12-18 00:32:24,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:32:24" (3/3) ... [2021-12-18 00:32:24,685 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_begin_harness.i [2021-12-18 00:32:24,689 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:32:24,689 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:32:24,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:32:24,729 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 00:32:24,729 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:32:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 113 states have internal predecessors, (142), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-18 00:32:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-18 00:32:24,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:24,755 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:24,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1612502020, now seen corresponding path program 1 times [2021-12-18 00:32:24,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:24,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32640324] [2021-12-18 00:32:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:24,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:25,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:25,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:25,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:25,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:25,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32640324] [2021-12-18 00:32:25,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-12-18 00:32:25,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704725436] [2021-12-18 00:32:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:25,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:25,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:25,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 00:32:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-18 00:32:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-18 00:32:26,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:26,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704725436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:26,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:32:26,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 00:32:26,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657327178] [2021-12-18 00:32:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:26,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 00:32:26,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 00:32:26,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 00:32:26,196 INFO L87 Difference]: Start difference. First operand has 171 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 113 states have internal predecessors, (142), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-18 00:32:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:26,244 INFO L93 Difference]: Finished difference Result 333 states and 453 transitions. [2021-12-18 00:32:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 00:32:26,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 148 [2021-12-18 00:32:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:26,257 INFO L225 Difference]: With dead ends: 333 [2021-12-18 00:32:26,257 INFO L226 Difference]: Without dead ends: 164 [2021-12-18 00:32:26,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 00:32:26,275 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:26,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:32:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-18 00:32:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-12-18 00:32:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 107 states have internal predecessors, (130), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-18 00:32:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 209 transitions. [2021-12-18 00:32:26,334 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 209 transitions. Word has length 148 [2021-12-18 00:32:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:26,335 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 209 transitions. [2021-12-18 00:32:26,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-18 00:32:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 209 transitions. [2021-12-18 00:32:26,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-18 00:32:26,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:26,341 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:26,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:26,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-18 00:32:26,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash 818348810, now seen corresponding path program 1 times [2021-12-18 00:32:26,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:26,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159947459] [2021-12-18 00:32:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:26,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:26,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:32:26,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312842268] [2021-12-18 00:32:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:26,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:26,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:26,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 00:32:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:27,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 2584 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:32:27,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-18 00:32:27,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:32:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-18 00:32:27,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:27,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159947459] [2021-12-18 00:32:27,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:32:27,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312842268] [2021-12-18 00:32:27,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312842268] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:27,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:27,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-12-18 00:32:27,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125982363] [2021-12-18 00:32:27,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:27,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:32:27,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:32:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:32:27,909 INFO L87 Difference]: Start difference. First operand 164 states and 209 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-18 00:32:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:28,163 INFO L93 Difference]: Finished difference Result 230 states and 298 transitions. [2021-12-18 00:32:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:32:28,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 154 [2021-12-18 00:32:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:28,167 INFO L225 Difference]: With dead ends: 230 [2021-12-18 00:32:28,167 INFO L226 Difference]: Without dead ends: 166 [2021-12-18 00:32:28,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-18 00:32:28,169 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 212 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:28,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 827 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:32:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-18 00:32:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-12-18 00:32:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 40 states have call successors, (40), 17 states have call predecessors, (40), 18 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2021-12-18 00:32:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 211 transitions. [2021-12-18 00:32:28,183 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 211 transitions. Word has length 154 [2021-12-18 00:32:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:28,184 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 211 transitions. [2021-12-18 00:32:28,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-18 00:32:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 211 transitions. [2021-12-18 00:32:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-18 00:32:28,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:28,186 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:28,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-18 00:32:28,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-18 00:32:28,399 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash -226987588, now seen corresponding path program 1 times [2021-12-18 00:32:28,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:28,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407096800] [2021-12-18 00:32:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:28,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:28,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:32:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82378262] [2021-12-18 00:32:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:28,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:28,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:28,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:28,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 00:32:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:32:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-18 00:32:29,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:29,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407096800] [2021-12-18 00:32:29,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:32:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82378262] [2021-12-18 00:32:29,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82378262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:29,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:32:29,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:32:29,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151682736] [2021-12-18 00:32:29,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:32:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:32:29,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:32:29,190 INFO L87 Difference]: Start difference. First operand 166 states and 211 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-18 00:32:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:29,217 INFO L93 Difference]: Finished difference Result 325 states and 414 transitions. [2021-12-18 00:32:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:32:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 155 [2021-12-18 00:32:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:29,220 INFO L225 Difference]: With dead ends: 325 [2021-12-18 00:32:29,220 INFO L226 Difference]: Without dead ends: 171 [2021-12-18 00:32:29,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:32:29,221 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:29,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 820 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:32:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-18 00:32:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-18 00:32:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 40 states have call successors, (40), 17 states have call predecessors, (40), 19 states have return successors, (41), 40 states have call predecessors, (41), 39 states have call successors, (41) [2021-12-18 00:32:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2021-12-18 00:32:29,234 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 155 [2021-12-18 00:32:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:29,234 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2021-12-18 00:32:29,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-18 00:32:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2021-12-18 00:32:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-18 00:32:29,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:29,237 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:29,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:29,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:29,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1170775228, now seen corresponding path program 1 times [2021-12-18 00:32:29,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861436369] [2021-12-18 00:32:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:29,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:32:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:32:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:29,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:32:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-18 00:32:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:32:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-18 00:32:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:32:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-18 00:32:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-18 00:32:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-18 00:32:30,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861436369] [2021-12-18 00:32:30,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861436369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507858276] [2021-12-18 00:32:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:30,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:30,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:30,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 00:32:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 00:32:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:30,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:32:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-18 00:32:31,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:31,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507858276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:31,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:31,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2021-12-18 00:32:31,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319585560] [2021-12-18 00:32:31,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:31,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 00:32:31,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 00:32:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:32:31,308 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-12-18 00:32:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:31,444 INFO L93 Difference]: Finished difference Result 330 states and 416 transitions. [2021-12-18 00:32:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 00:32:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 167 [2021-12-18 00:32:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:31,447 INFO L225 Difference]: With dead ends: 330 [2021-12-18 00:32:31,447 INFO L226 Difference]: Without dead ends: 180 [2021-12-18 00:32:31,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-18 00:32:31,449 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 12 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:31,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1688 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2021-12-18 00:32:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-18 00:32:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-12-18 00:32:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 119 states have (on average 1.218487394957983) internal successors, (145), 121 states have internal predecessors, (145), 40 states have call successors, (40), 18 states have call predecessors, (40), 20 states have return successors, (42), 40 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-18 00:32:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 227 transitions. [2021-12-18 00:32:31,460 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 227 transitions. Word has length 167 [2021-12-18 00:32:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:31,460 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 227 transitions. [2021-12-18 00:32:31,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-12-18 00:32:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 227 transitions. [2021-12-18 00:32:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-18 00:32:31,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:31,463 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:31,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:31,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:31,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash -695933446, now seen corresponding path program 1 times [2021-12-18 00:32:31,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:31,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587898774] [2021-12-18 00:32:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:31,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:32:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:31,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:32:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:32:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-18 00:32:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:32:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-18 00:32:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:32:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-18 00:32:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-18 00:32:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-18 00:32:32,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:32,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587898774] [2021-12-18 00:32:32,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587898774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:32,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313643648] [2021-12-18 00:32:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:32,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:32,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:32,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 00:32:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:32,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2592 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 00:32:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-18 00:32:32,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:32,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313643648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:32,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:32,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-12-18 00:32:32,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102564512] [2021-12-18 00:32:32,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:32,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:32:32,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:32:32,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:32:32,867 INFO L87 Difference]: Start difference. First operand 180 states and 227 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-18 00:32:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:33,016 INFO L93 Difference]: Finished difference Result 334 states and 425 transitions. [2021-12-18 00:32:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:32:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 167 [2021-12-18 00:32:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:33,018 INFO L225 Difference]: With dead ends: 334 [2021-12-18 00:32:33,018 INFO L226 Difference]: Without dead ends: 182 [2021-12-18 00:32:33,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:32:33,020 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 217 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:33,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 519 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:32:33,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-18 00:32:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-12-18 00:32:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 120 states have (on average 1.2083333333333333) internal successors, (145), 122 states have internal predecessors, (145), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (45), 41 states have call predecessors, (45), 40 states have call successors, (45) [2021-12-18 00:32:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 231 transitions. [2021-12-18 00:32:33,031 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 231 transitions. Word has length 167 [2021-12-18 00:32:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:33,031 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 231 transitions. [2021-12-18 00:32:33,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-18 00:32:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 231 transitions. [2021-12-18 00:32:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-18 00:32:33,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:33,034 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:33,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:33,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:33,252 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:33,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1022744148, now seen corresponding path program 1 times [2021-12-18 00:32:33,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:33,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211446019] [2021-12-18 00:32:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:33,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:32:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-18 00:32:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-18 00:32:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:32:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:32:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:32:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:32:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:32:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-18 00:32:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-18 00:32:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-18 00:32:33,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:33,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211446019] [2021-12-18 00:32:33,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211446019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:33,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459075988] [2021-12-18 00:32:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:33,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:33,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:33,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:33,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 00:32:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 00:32:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:35,200 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((aws_hash_table_is_valid_~map.base Int) (aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.offset| aws_hash_table_is_valid_~map.base) aws_hash_table_is_valid_~map.offset) 0))) (exists ((aws_hash_table_is_valid_~map.base Int) (aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.base| aws_hash_table_is_valid_~map.base) aws_hash_table_is_valid_~map.offset) 0)))) is different from true [2021-12-18 00:32:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-18 00:32:41,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:41,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459075988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:41,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:41,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-12-18 00:32:41,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733013165] [2021-12-18 00:32:41,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:41,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:32:41,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:32:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=202, Unknown=3, NotChecked=28, Total=272 [2021-12-18 00:32:41,121 INFO L87 Difference]: Start difference. First operand 182 states and 231 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2021-12-18 00:32:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:41,329 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2021-12-18 00:32:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:32:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) Word has length 173 [2021-12-18 00:32:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:41,331 INFO L225 Difference]: With dead ends: 341 [2021-12-18 00:32:41,331 INFO L226 Difference]: Without dead ends: 185 [2021-12-18 00:32:41,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=54, Invalid=253, Unknown=3, NotChecked=32, Total=342 [2021-12-18 00:32:41,333 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:41,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1107 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 313 Unchecked, 0.1s Time] [2021-12-18 00:32:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-18 00:32:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-12-18 00:32:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 123 states have internal predecessors, (147), 41 states have call successors, (41), 19 states have call predecessors, (41), 20 states have return successors, (45), 41 states have call predecessors, (45), 40 states have call successors, (45) [2021-12-18 00:32:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 233 transitions. [2021-12-18 00:32:41,342 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 233 transitions. Word has length 173 [2021-12-18 00:32:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:41,343 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 233 transitions. [2021-12-18 00:32:41,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 3 states have call successors, (26) [2021-12-18 00:32:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 233 transitions. [2021-12-18 00:32:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 00:32:41,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:41,345 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:41,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:41,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:41,560 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash -183837512, now seen corresponding path program 1 times [2021-12-18 00:32:41,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:41,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504360250] [2021-12-18 00:32:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:41,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:41,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:32:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:32:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:32:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:32:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-18 00:32:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-18 00:32:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 00:32:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-18 00:32:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-18 00:32:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-18 00:32:42,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504360250] [2021-12-18 00:32:42,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504360250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:42,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26434111] [2021-12-18 00:32:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:42,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:42,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:42,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:42,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 00:32:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 00:32:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 00:32:43,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:32:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:43,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 48 [2021-12-18 00:32:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-18 00:32:44,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:32:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-18 00:32:44,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-18 00:32:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-18 00:32:44,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26434111] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:44,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:32:44,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [21, 18] total 47 [2021-12-18 00:32:44,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416148328] [2021-12-18 00:32:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:44,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 00:32:44,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 00:32:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2037, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 00:32:44,939 INFO L87 Difference]: Start difference. First operand 184 states and 233 transitions. Second operand has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-18 00:32:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:45,555 INFO L93 Difference]: Finished difference Result 275 states and 358 transitions. [2021-12-18 00:32:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 00:32:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 178 [2021-12-18 00:32:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:45,557 INFO L225 Difference]: With dead ends: 275 [2021-12-18 00:32:45,557 INFO L226 Difference]: Without dead ends: 200 [2021-12-18 00:32:45,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 374 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 00:32:45,559 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 36 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:45,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 2172 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2021-12-18 00:32:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-18 00:32:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2021-12-18 00:32:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 133 states have internal predecessors, (157), 43 states have call successors, (43), 19 states have call predecessors, (43), 22 states have return successors, (54), 43 states have call predecessors, (54), 42 states have call successors, (54) [2021-12-18 00:32:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 254 transitions. [2021-12-18 00:32:45,571 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 254 transitions. Word has length 178 [2021-12-18 00:32:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:45,572 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 254 transitions. [2021-12-18 00:32:45,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-18 00:32:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 254 transitions. [2021-12-18 00:32:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 00:32:45,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:45,574 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:45,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:45,787 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash -317851018, now seen corresponding path program 1 times [2021-12-18 00:32:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499187676] [2021-12-18 00:32:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:45,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:45,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:45,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:32:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:32:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:32:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:32:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-18 00:32:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-18 00:32:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 00:32:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-18 00:32:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-18 00:32:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-18 00:32:46,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:46,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499187676] [2021-12-18 00:32:46,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499187676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:46,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113965016] [2021-12-18 00:32:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:46,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:46,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:46,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:46,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 00:32:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:32:46,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:32:47,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 00:32:47,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:32:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-18 00:32:47,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:47,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113965016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:47,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:47,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 29 [2021-12-18 00:32:47,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722360965] [2021-12-18 00:32:47,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:47,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 00:32:47,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 00:32:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:32:47,423 INFO L87 Difference]: Start difference. First operand 196 states and 254 transitions. Second operand has 14 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 8 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-18 00:32:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:47,807 INFO L93 Difference]: Finished difference Result 373 states and 479 transitions. [2021-12-18 00:32:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 00:32:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 8 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 178 [2021-12-18 00:32:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:47,809 INFO L225 Difference]: With dead ends: 373 [2021-12-18 00:32:47,810 INFO L226 Difference]: Without dead ends: 258 [2021-12-18 00:32:47,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 00:32:47,811 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 217 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:47,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1621 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 295 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2021-12-18 00:32:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-18 00:32:47,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2021-12-18 00:32:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 175 states have (on average 1.2285714285714286) internal successors, (215), 179 states have internal predecessors, (215), 47 states have call successors, (47), 27 states have call predecessors, (47), 31 states have return successors, (56), 47 states have call predecessors, (56), 46 states have call successors, (56) [2021-12-18 00:32:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 318 transitions. [2021-12-18 00:32:47,826 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 318 transitions. Word has length 178 [2021-12-18 00:32:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:47,826 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 318 transitions. [2021-12-18 00:32:47,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 8 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-18 00:32:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 318 transitions. [2021-12-18 00:32:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-18 00:32:47,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:47,829 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:47,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:48,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-18 00:32:48,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1017170911, now seen corresponding path program 1 times [2021-12-18 00:32:48,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:48,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228894382] [2021-12-18 00:32:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:48,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:32:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:32:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:32:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:32:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-18 00:32:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-18 00:32:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:32:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-18 00:32:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-18 00:32:48,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:48,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228894382] [2021-12-18 00:32:48,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228894382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:48,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373895115] [2021-12-18 00:32:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:48,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:48,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:48,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 00:32:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 00:32:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-18 00:32:49,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:49,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373895115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:49,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:49,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [21] total 26 [2021-12-18 00:32:49,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807889663] [2021-12-18 00:32:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:49,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:32:49,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:49,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:32:49,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-12-18 00:32:49,689 INFO L87 Difference]: Start difference. First operand 254 states and 318 transitions. Second operand has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-18 00:32:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:49,775 INFO L93 Difference]: Finished difference Result 427 states and 538 transitions. [2021-12-18 00:32:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:32:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 182 [2021-12-18 00:32:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:49,777 INFO L225 Difference]: With dead ends: 427 [2021-12-18 00:32:49,777 INFO L226 Difference]: Without dead ends: 260 [2021-12-18 00:32:49,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-12-18 00:32:49,779 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 2 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:49,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1162 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:32:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-18 00:32:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2021-12-18 00:32:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 175 states have (on average 1.2285714285714286) internal successors, (215), 179 states have internal predecessors, (215), 47 states have call successors, (47), 27 states have call predecessors, (47), 31 states have return successors, (55), 47 states have call predecessors, (55), 46 states have call successors, (55) [2021-12-18 00:32:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2021-12-18 00:32:49,792 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 182 [2021-12-18 00:32:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:49,793 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2021-12-18 00:32:49,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-18 00:32:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2021-12-18 00:32:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-18 00:32:49,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:49,796 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:49,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:50,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:50,023 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1394290473, now seen corresponding path program 2 times [2021-12-18 00:32:50,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:50,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596848492] [2021-12-18 00:32:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:50,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:32:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:32:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:32:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:32:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:32:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-18 00:32:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-18 00:32:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-18 00:32:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-12-18 00:32:50,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:50,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596848492] [2021-12-18 00:32:50,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596848492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:50,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:32:50,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 00:32:50,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881038545] [2021-12-18 00:32:50,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:50,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 00:32:50,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 00:32:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:32:50,662 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand has 15 states, 14 states have (on average 5.214285714285714) internal successors, (73), 10 states have internal predecessors, (73), 6 states have call successors, (27), 7 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-18 00:32:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:51,918 INFO L93 Difference]: Finished difference Result 347 states and 440 transitions. [2021-12-18 00:32:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 00:32:51,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.214285714285714) internal successors, (73), 10 states have internal predecessors, (73), 6 states have call successors, (27), 7 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 193 [2021-12-18 00:32:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:51,920 INFO L225 Difference]: With dead ends: 347 [2021-12-18 00:32:51,920 INFO L226 Difference]: Without dead ends: 274 [2021-12-18 00:32:51,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-12-18 00:32:51,922 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 248 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:51,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 930 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 00:32:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-18 00:32:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 254. [2021-12-18 00:32:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 175 states have (on average 1.2285714285714286) internal successors, (215), 179 states have internal predecessors, (215), 47 states have call successors, (47), 27 states have call predecessors, (47), 31 states have return successors, (55), 47 states have call predecessors, (55), 46 states have call successors, (55) [2021-12-18 00:32:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2021-12-18 00:32:51,937 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 193 [2021-12-18 00:32:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2021-12-18 00:32:51,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.214285714285714) internal successors, (73), 10 states have internal predecessors, (73), 6 states have call successors, (27), 7 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-18 00:32:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2021-12-18 00:32:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-18 00:32:51,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:51,941 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:51,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 00:32:51,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash 476694279, now seen corresponding path program 1 times [2021-12-18 00:32:51,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:51,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082101894] [2021-12-18 00:32:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:51,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:32:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:32:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:32:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:32:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:32:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-18 00:32:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-18 00:32:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:53,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-18 00:32:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:53,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:32:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:53,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:32:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-18 00:32:53,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082101894] [2021-12-18 00:32:53,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082101894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857028777] [2021-12-18 00:32:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:53,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:53,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:53,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 00:32:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 00:32:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-18 00:32:54,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:54,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857028777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:54,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:54,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [26] total 31 [2021-12-18 00:32:54,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79738365] [2021-12-18 00:32:54,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:54,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:32:54,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:54,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:32:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-12-18 00:32:54,051 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-18 00:32:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:54,143 INFO L93 Difference]: Finished difference Result 390 states and 488 transitions. [2021-12-18 00:32:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:32:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 198 [2021-12-18 00:32:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:54,148 INFO L225 Difference]: With dead ends: 390 [2021-12-18 00:32:54,148 INFO L226 Difference]: Without dead ends: 253 [2021-12-18 00:32:54,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2021-12-18 00:32:54,149 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 2 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:54,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1162 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:32:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-18 00:32:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 242. [2021-12-18 00:32:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 167 states have (on average 1.2275449101796407) internal successors, (205), 169 states have internal predecessors, (205), 45 states have call successors, (45), 27 states have call predecessors, (45), 29 states have return successors, (50), 45 states have call predecessors, (50), 44 states have call successors, (50) [2021-12-18 00:32:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 300 transitions. [2021-12-18 00:32:54,163 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 300 transitions. Word has length 198 [2021-12-18 00:32:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:54,164 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 300 transitions. [2021-12-18 00:32:54,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-12-18 00:32:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 300 transitions. [2021-12-18 00:32:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-18 00:32:54,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:54,167 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:54,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:54,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-18 00:32:54,383 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash 450820696, now seen corresponding path program 1 times [2021-12-18 00:32:54,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:54,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907274292] [2021-12-18 00:32:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:54,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:32:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:32:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:32:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:32:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:32:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-18 00:32:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-18 00:32:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-18 00:32:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-18 00:32:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-18 00:32:54,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:54,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907274292] [2021-12-18 00:32:54,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907274292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:54,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:32:54,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 00:32:54,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233997947] [2021-12-18 00:32:54,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:54,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 00:32:54,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 00:32:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:32:54,952 INFO L87 Difference]: Start difference. First operand 242 states and 300 transitions. Second operand has 15 states, 14 states have (on average 4.928571428571429) internal successors, (69), 9 states have internal predecessors, (69), 6 states have call successors, (27), 8 states have call predecessors, (27), 2 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2021-12-18 00:32:56,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:56,291 INFO L93 Difference]: Finished difference Result 346 states and 435 transitions. [2021-12-18 00:32:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 00:32:56,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.928571428571429) internal successors, (69), 9 states have internal predecessors, (69), 6 states have call successors, (27), 8 states have call predecessors, (27), 2 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 200 [2021-12-18 00:32:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:56,294 INFO L225 Difference]: With dead ends: 346 [2021-12-18 00:32:56,294 INFO L226 Difference]: Without dead ends: 262 [2021-12-18 00:32:56,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:32:56,297 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 253 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:56,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 997 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 00:32:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-18 00:32:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 242. [2021-12-18 00:32:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 167 states have (on average 1.221556886227545) internal successors, (204), 169 states have internal predecessors, (204), 45 states have call successors, (45), 27 states have call predecessors, (45), 29 states have return successors, (50), 45 states have call predecessors, (50), 44 states have call successors, (50) [2021-12-18 00:32:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 299 transitions. [2021-12-18 00:32:56,314 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 299 transitions. Word has length 200 [2021-12-18 00:32:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:56,315 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 299 transitions. [2021-12-18 00:32:56,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.928571428571429) internal successors, (69), 9 states have internal predecessors, (69), 6 states have call successors, (27), 8 states have call predecessors, (27), 2 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2021-12-18 00:32:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 299 transitions. [2021-12-18 00:32:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-18 00:32:56,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:56,317 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:56,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 00:32:56,318 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:56,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1734404003, now seen corresponding path program 2 times [2021-12-18 00:32:56,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:56,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053655567] [2021-12-18 00:32:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:56,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:32:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:32:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:32:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:32:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:32:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:32:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:56,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:32:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:32:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:32:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:32:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:32:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:32:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:32:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:32:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:32:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-18 00:32:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-18 00:32:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:32:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:32:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-18 00:32:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-18 00:32:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:32:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-12-18 00:32:57,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:32:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053655567] [2021-12-18 00:32:57,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053655567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:32:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667581754] [2021-12-18 00:32:57,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:32:57,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:57,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:57,500 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:57,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 00:32:58,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:32:58,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:32:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 2786 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 00:32:58,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:32:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-18 00:32:58,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:32:58,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667581754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:32:58,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:32:58,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [31] total 35 [2021-12-18 00:32:58,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298200533] [2021-12-18 00:32:58,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:32:58,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:32:58,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:32:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:32:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 00:32:58,897 INFO L87 Difference]: Start difference. First operand 242 states and 299 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-12-18 00:32:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:32:59,001 INFO L93 Difference]: Finished difference Result 474 states and 585 transitions. [2021-12-18 00:32:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:32:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 209 [2021-12-18 00:32:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:32:59,004 INFO L225 Difference]: With dead ends: 474 [2021-12-18 00:32:59,004 INFO L226 Difference]: Without dead ends: 244 [2021-12-18 00:32:59,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 00:32:59,005 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:32:59,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 956 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:32:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-18 00:32:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-12-18 00:32:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 168 states have (on average 1.2202380952380953) internal successors, (205), 171 states have internal predecessors, (205), 45 states have call successors, (45), 27 states have call predecessors, (45), 30 states have return successors, (51), 45 states have call predecessors, (51), 44 states have call successors, (51) [2021-12-18 00:32:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 301 transitions. [2021-12-18 00:32:59,019 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 301 transitions. Word has length 209 [2021-12-18 00:32:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:32:59,020 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 301 transitions. [2021-12-18 00:32:59,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-12-18 00:32:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 301 transitions. [2021-12-18 00:32:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-18 00:32:59,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:32:59,023 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:32:59,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 00:32:59,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 00:32:59,243 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:32:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:32:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1271160118, now seen corresponding path program 1 times [2021-12-18 00:32:59,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:32:59,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880843090] [2021-12-18 00:32:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:59,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:32:59,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:32:59,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188269737] [2021-12-18 00:32:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:32:59,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:32:59,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:32:59,295 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:32:59,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 00:32:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:32:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 2891 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 00:32:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-18 00:33:00,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:33:00,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:00,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880843090] [2021-12-18 00:33:00,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:00,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188269737] [2021-12-18 00:33:00,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188269737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:33:00,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:33:00,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 00:33:00,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211140009] [2021-12-18 00:33:00,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:33:00,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:33:00,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:33:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:33:00,152 INFO L87 Difference]: Start difference. First operand 244 states and 301 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-12-18 00:33:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:00,221 INFO L93 Difference]: Finished difference Result 415 states and 516 transitions. [2021-12-18 00:33:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:33:00,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 215 [2021-12-18 00:33:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:00,223 INFO L225 Difference]: With dead ends: 415 [2021-12-18 00:33:00,224 INFO L226 Difference]: Without dead ends: 242 [2021-12-18 00:33:00,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:33:00,225 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:00,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 956 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:33:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-18 00:33:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 237. [2021-12-18 00:33:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 163 states have (on average 1.2147239263803682) internal successors, (198), 165 states have internal predecessors, (198), 45 states have call successors, (45), 27 states have call predecessors, (45), 28 states have return successors, (49), 44 states have call predecessors, (49), 44 states have call successors, (49) [2021-12-18 00:33:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 292 transitions. [2021-12-18 00:33:00,237 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 292 transitions. Word has length 215 [2021-12-18 00:33:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:00,237 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 292 transitions. [2021-12-18 00:33:00,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-12-18 00:33:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 292 transitions. [2021-12-18 00:33:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-18 00:33:00,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:00,239 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:00,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 00:33:00,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 00:33:00,459 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1244691977, now seen corresponding path program 1 times [2021-12-18 00:33:00,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929383356] [2021-12-18 00:33:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:00,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:00,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093436050] [2021-12-18 00:33:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:00,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:00,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:00,507 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:00,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 00:33:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2996 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 00:33:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:01,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 00:33:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,536 INFO L354 Elim1Store]: treesize reduction 252, result has 4.2 percent of original size [2021-12-18 00:33:02,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 78 [2021-12-18 00:33:02,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:02,551 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 00:33:02,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 79 [2021-12-18 00:33:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-18 00:33:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:33:04,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929383356] [2021-12-18 00:33:04,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093436050] [2021-12-18 00:33:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093436050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:33:04,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:33:04,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-18 00:33:04,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060248614] [2021-12-18 00:33:04,065 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:33:04,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 00:33:04,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 00:33:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 00:33:04,067 INFO L87 Difference]: Start difference. First operand 237 states and 292 transitions. Second operand has 25 states, 22 states have (on average 4.5) internal successors, (99), 23 states have internal predecessors, (99), 12 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-18 00:33:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:05,544 INFO L93 Difference]: Finished difference Result 339 states and 419 transitions. [2021-12-18 00:33:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 00:33:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.5) internal successors, (99), 23 states have internal predecessors, (99), 12 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 221 [2021-12-18 00:33:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:05,546 INFO L225 Difference]: With dead ends: 339 [2021-12-18 00:33:05,547 INFO L226 Difference]: Without dead ends: 252 [2021-12-18 00:33:05,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 206 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=204, Invalid=1601, Unknown=1, NotChecked=0, Total=1806 [2021-12-18 00:33:05,548 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 83 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:05,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 2197 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 132 Invalid, 0 Unknown, 290 Unchecked, 0.3s Time] [2021-12-18 00:33:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-18 00:33:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-12-18 00:33:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 174 states have (on average 1.206896551724138) internal successors, (210), 176 states have internal predecessors, (210), 46 states have call successors, (46), 29 states have call predecessors, (46), 31 states have return successors, (51), 46 states have call predecessors, (51), 45 states have call successors, (51) [2021-12-18 00:33:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 307 transitions. [2021-12-18 00:33:05,560 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 307 transitions. Word has length 221 [2021-12-18 00:33:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:05,560 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 307 transitions. [2021-12-18 00:33:05,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.5) internal successors, (99), 23 states have internal predecessors, (99), 12 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-18 00:33:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 307 transitions. [2021-12-18 00:33:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-18 00:33:05,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:05,562 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:05,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 00:33:05,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 00:33:05,787 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1831497991, now seen corresponding path program 1 times [2021-12-18 00:33:05,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:05,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812373401] [2021-12-18 00:33:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:05,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:05,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455718289] [2021-12-18 00:33:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:05,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:05,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:05,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 00:33:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 00:33:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:07,417 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((aws_hash_iter_is_valid_~iter.offset Int) (aws_hash_iter_is_valid_~iter.base Int)) (not (= (select (select |c_#memory_$Pointer$.offset| aws_hash_iter_is_valid_~iter.base) aws_hash_iter_is_valid_~iter.offset) 0))) (exists ((aws_hash_iter_is_valid_~iter.offset Int) (aws_hash_iter_is_valid_~iter.base Int)) (not (= (select (select |c_#memory_$Pointer$.base| aws_hash_iter_is_valid_~iter.base) aws_hash_iter_is_valid_~iter.offset) 0)))) is different from true [2021-12-18 00:33:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-18 00:33:11,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:33:11,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:11,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812373401] [2021-12-18 00:33:11,897 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:11,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455718289] [2021-12-18 00:33:11,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455718289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:33:11,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:33:11,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:33:11,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054561220] [2021-12-18 00:33:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:33:11,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:33:11,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:33:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=22, Unknown=1, NotChecked=8, Total=42 [2021-12-18 00:33:11,898 INFO L87 Difference]: Start difference. First operand 252 states and 307 transitions. Second operand has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-18 00:33:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:11,988 INFO L93 Difference]: Finished difference Result 358 states and 449 transitions. [2021-12-18 00:33:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:33:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 221 [2021-12-18 00:33:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:11,990 INFO L225 Difference]: With dead ends: 358 [2021-12-18 00:33:11,990 INFO L226 Difference]: Without dead ends: 254 [2021-12-18 00:33:11,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=11, Invalid=22, Unknown=1, NotChecked=8, Total=42 [2021-12-18 00:33:11,991 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 0 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:11,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 918 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 311 Unchecked, 0.1s Time] [2021-12-18 00:33:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-18 00:33:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-12-18 00:33:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 176 states have (on average 1.1875) internal successors, (209), 177 states have internal predecessors, (209), 46 states have call successors, (46), 30 states have call predecessors, (46), 31 states have return successors, (51), 46 states have call predecessors, (51), 45 states have call successors, (51) [2021-12-18 00:33:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 306 transitions. [2021-12-18 00:33:12,003 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 306 transitions. Word has length 221 [2021-12-18 00:33:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:12,004 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 306 transitions. [2021-12-18 00:33:12,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-18 00:33:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 306 transitions. [2021-12-18 00:33:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-18 00:33:12,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:12,006 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:12,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-18 00:33:12,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:12,219 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash -359144008, now seen corresponding path program 1 times [2021-12-18 00:33:12,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:12,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098372635] [2021-12-18 00:33:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:12,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:12,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:12,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532254037] [2021-12-18 00:33:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:12,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:12,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:12,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:12,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 00:33:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 00:33:12,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:13,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 00:33:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,009 INFO L354 Elim1Store]: treesize reduction 268, result has 3.9 percent of original size [2021-12-18 00:33:15,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 78 [2021-12-18 00:33:15,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:15,033 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 00:33:15,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 79 [2021-12-18 00:33:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-18 00:33:15,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:33:16,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098372635] [2021-12-18 00:33:16,757 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532254037] [2021-12-18 00:33:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532254037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:33:16,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:33:16,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-18 00:33:16,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027981743] [2021-12-18 00:33:16,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:33:16,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 00:33:16,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 00:33:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=994, Unknown=1, NotChecked=0, Total=1122 [2021-12-18 00:33:16,759 INFO L87 Difference]: Start difference. First operand 254 states and 306 transitions. Second operand has 25 states, 22 states have (on average 4.545454545454546) internal successors, (100), 23 states have internal predecessors, (100), 12 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-18 00:33:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:17,374 INFO L93 Difference]: Finished difference Result 349 states and 430 transitions. [2021-12-18 00:33:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 00:33:17,375 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.545454545454546) internal successors, (100), 23 states have internal predecessors, (100), 12 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 222 [2021-12-18 00:33:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:17,376 INFO L225 Difference]: With dead ends: 349 [2021-12-18 00:33:17,376 INFO L226 Difference]: Without dead ends: 259 [2021-12-18 00:33:17,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 206 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=175, Invalid=1464, Unknown=1, NotChecked=0, Total=1640 [2021-12-18 00:33:17,378 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 103 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:17,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 2593 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 173 Invalid, 0 Unknown, 306 Unchecked, 0.3s Time] [2021-12-18 00:33:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-18 00:33:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-12-18 00:33:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 181 states have (on average 1.1823204419889504) internal successors, (214), 182 states have internal predecessors, (214), 46 states have call successors, (46), 30 states have call predecessors, (46), 31 states have return successors, (51), 46 states have call predecessors, (51), 45 states have call successors, (51) [2021-12-18 00:33:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2021-12-18 00:33:17,389 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 222 [2021-12-18 00:33:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:17,390 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2021-12-18 00:33:17,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.545454545454546) internal successors, (100), 23 states have internal predecessors, (100), 12 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-18 00:33:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2021-12-18 00:33:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-18 00:33:17,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:17,392 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:17,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 00:33:17,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-18 00:33:17,616 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1656342513, now seen corresponding path program 1 times [2021-12-18 00:33:17,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:17,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969658761] [2021-12-18 00:33:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:17,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:17,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:17,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387936862] [2021-12-18 00:33:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:17,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:17,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:17,659 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:17,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 00:33:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 3050 conjuncts, 368 conjunts are in the unsatisfiable core [2021-12-18 00:33:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:18,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:33:18,894 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:33:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:33:18,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:33:19,380 INFO L354 Elim1Store]: treesize reduction 173, result has 26.4 percent of original size [2021-12-18 00:33:19,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 186 [2021-12-18 00:33:19,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:33:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:19,756 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:33:19,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-12-18 00:33:19,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-18 00:33:19,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:33:20,176 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-12-18 00:33:20,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-12-18 00:33:20,329 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3669 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3669))) is different from true [2021-12-18 00:33:20,441 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3670 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_3670))) is different from true [2021-12-18 00:33:20,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:20,533 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:33:20,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 25 [2021-12-18 00:33:20,539 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 00:33:20,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 00:33:22,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-12-18 00:33:22,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,171 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 00:33:22,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 74 [2021-12-18 00:33:22,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:22,186 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-12-18 00:33:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 65 [2021-12-18 00:33:33,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:33,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:33:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:33,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:33:33,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:33:33,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 61 [2021-12-18 00:33:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 123 proven. 156 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2021-12-18 00:33:33,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:33:36,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969658761] [2021-12-18 00:33:36,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387936862] [2021-12-18 00:33:36,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387936862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:33:36,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:33:36,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2021-12-18 00:33:36,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587363715] [2021-12-18 00:33:36,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:33:36,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 00:33:36,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 00:33:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=5967, Unknown=43, NotChecked=314, Total=6642 [2021-12-18 00:33:36,636 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand has 69 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 27 states have call successors, (39), 13 states have call predecessors, (39), 21 states have return successors, (36), 26 states have call predecessors, (36), 26 states have call successors, (36) [2021-12-18 00:33:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:41,469 INFO L93 Difference]: Finished difference Result 547 states and 647 transitions. [2021-12-18 00:33:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-18 00:33:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 27 states have call successors, (39), 13 states have call predecessors, (39), 21 states have return successors, (36), 26 states have call predecessors, (36), 26 states have call successors, (36) Word has length 232 [2021-12-18 00:33:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:41,472 INFO L225 Difference]: With dead ends: 547 [2021-12-18 00:33:41,472 INFO L226 Difference]: Without dead ends: 399 [2021-12-18 00:33:41,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 190 SyntacticMatches, 18 SemanticMatches, 122 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4573 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=693, Invalid=14005, Unknown=72, NotChecked=482, Total=15252 [2021-12-18 00:33:41,476 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 203 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 6516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5362 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:41,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 2412 Invalid, 6516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1026 Invalid, 0 Unknown, 5362 Unchecked, 1.0s Time] [2021-12-18 00:33:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-18 00:33:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 389. [2021-12-18 00:33:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 270 states have (on average 1.1296296296296295) internal successors, (305), 273 states have internal predecessors, (305), 67 states have call successors, (67), 48 states have call predecessors, (67), 51 states have return successors, (80), 67 states have call predecessors, (80), 66 states have call successors, (80) [2021-12-18 00:33:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 452 transitions. [2021-12-18 00:33:41,495 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 452 transitions. Word has length 232 [2021-12-18 00:33:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:41,496 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 452 transitions. [2021-12-18 00:33:41,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 56 states have (on average 2.75) internal successors, (154), 56 states have internal predecessors, (154), 27 states have call successors, (39), 13 states have call predecessors, (39), 21 states have return successors, (36), 26 states have call predecessors, (36), 26 states have call successors, (36) [2021-12-18 00:33:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 452 transitions. [2021-12-18 00:33:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-18 00:33:41,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:41,498 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:41,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-18 00:33:41,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 00:33:41,711 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash 86404045, now seen corresponding path program 1 times [2021-12-18 00:33:41,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455154554] [2021-12-18 00:33:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:41,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:41,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:41,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523429476] [2021-12-18 00:33:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:41,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:41,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:41,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:41,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 00:33:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 352 conjunts are in the unsatisfiable core [2021-12-18 00:33:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:42,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:33:43,277 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:33:43,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:33:43,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:33:43,707 INFO L354 Elim1Store]: treesize reduction 116, result has 26.1 percent of original size [2021-12-18 00:33:43,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 117 treesize of output 137 [2021-12-18 00:33:43,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:33:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:43,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 00:33:44,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:33:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 00:33:44,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:33:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:44,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-12-18 00:33:44,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 00:33:45,126 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:33:45,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:33:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-12-18 00:33:45,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:33:45,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-18 00:33:45,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 00:33:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:33:45,439 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3960 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3960))) (exists ((v_ArrVal_3961 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3961))) (exists ((v_ArrVal_3959 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3959)))) is different from true [2021-12-18 00:33:45,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:33:45,671 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3963 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_3963))) (exists ((v_ArrVal_3964 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_3964))) (exists ((v_ArrVal_3962 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_3962)))) is different from true [2021-12-18 00:33:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:45,903 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:33:45,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 25 [2021-12-18 00:33:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:45,930 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:33:45,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-12-18 00:33:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:45,954 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:33:45,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2021-12-18 00:33:46,002 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:33:46,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:33:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 159 proven. 94 refuted. 0 times theorem prover too weak. 33 trivial. 6 not checked. [2021-12-18 00:33:47,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:33:48,085 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3968 (Array Int Int))) (<= (mod (select (select (store |c_#memory_int| |c_aws_hash_iter_begin_~#iter~1.base| v_ArrVal_3968) c_aws_hash_iter_begin_~state~11.base) (+ c_aws_hash_iter_begin_~state~11.offset 40)) 18446744073709551616) 0)) is different from false [2021-12-18 00:33:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-12-18 00:33:49,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455154554] [2021-12-18 00:33:49,151 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523429476] [2021-12-18 00:33:49,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523429476] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 00:33:49,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:33:49,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [41] total 48 [2021-12-18 00:33:49,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257724647] [2021-12-18 00:33:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:33:49,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:33:49,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:33:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1830, Unknown=16, NotChecked=264, Total=2256 [2021-12-18 00:33:49,153 INFO L87 Difference]: Start difference. First operand 389 states and 452 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2021-12-18 00:33:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:49,624 INFO L93 Difference]: Finished difference Result 556 states and 661 transitions. [2021-12-18 00:33:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 00:33:49,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) Word has length 235 [2021-12-18 00:33:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:49,627 INFO L225 Difference]: With dead ends: 556 [2021-12-18 00:33:49,627 INFO L226 Difference]: Without dead ends: 371 [2021-12-18 00:33:49,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 405 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=161, Invalid=2088, Unknown=19, NotChecked=282, Total=2550 [2021-12-18 00:33:49,628 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 12 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:49,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 1243 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2021-12-18 00:33:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-18 00:33:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 369. [2021-12-18 00:33:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 254 states have (on average 1.1377952755905512) internal successors, (289), 258 states have internal predecessors, (289), 67 states have call successors, (67), 43 states have call predecessors, (67), 47 states have return successors, (79), 67 states have call predecessors, (79), 66 states have call successors, (79) [2021-12-18 00:33:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 435 transitions. [2021-12-18 00:33:49,645 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 435 transitions. Word has length 235 [2021-12-18 00:33:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:49,646 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 435 transitions. [2021-12-18 00:33:49,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2021-12-18 00:33:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 435 transitions. [2021-12-18 00:33:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-18 00:33:49,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:49,648 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:49,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 00:33:49,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:49,871 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash -106795656, now seen corresponding path program 1 times [2021-12-18 00:33:49,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:49,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557741594] [2021-12-18 00:33:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:49,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:49,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:49,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469555647] [2021-12-18 00:33:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:49,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:49,911 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:49,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 00:33:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 00:33:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-18 00:33:50,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:33:50,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557741594] [2021-12-18 00:33:50,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469555647] [2021-12-18 00:33:50,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469555647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:33:50,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:33:50,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:33:50,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048975228] [2021-12-18 00:33:50,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:33:50,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:33:50,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:33:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:33:50,787 INFO L87 Difference]: Start difference. First operand 369 states and 435 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 6 states have internal predecessors, (101), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2021-12-18 00:33:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:50,830 INFO L93 Difference]: Finished difference Result 651 states and 776 transitions. [2021-12-18 00:33:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:33:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 6 states have internal predecessors, (101), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) Word has length 239 [2021-12-18 00:33:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:50,833 INFO L225 Difference]: With dead ends: 651 [2021-12-18 00:33:50,833 INFO L226 Difference]: Without dead ends: 364 [2021-12-18 00:33:50,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:33:50,834 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 2 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:50,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1235 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:33:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-18 00:33:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2021-12-18 00:33:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 251 states have (on average 1.1354581673306774) internal successors, (285), 254 states have internal predecessors, (285), 66 states have call successors, (66), 43 states have call predecessors, (66), 46 states have return successors, (76), 66 states have call predecessors, (76), 65 states have call successors, (76) [2021-12-18 00:33:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 427 transitions. [2021-12-18 00:33:50,852 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 427 transitions. Word has length 239 [2021-12-18 00:33:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:50,852 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 427 transitions. [2021-12-18 00:33:50,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 6 states have internal predecessors, (101), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2021-12-18 00:33:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 427 transitions. [2021-12-18 00:33:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-18 00:33:50,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:50,855 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:50,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 00:33:51,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:51,079 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1832870452, now seen corresponding path program 1 times [2021-12-18 00:33:51,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:51,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734166998] [2021-12-18 00:33:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:51,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:51,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:51,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917765609] [2021-12-18 00:33:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:51,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:51,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:51,122 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:51,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 00:33:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:51,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 00:33:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-18 00:33:52,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:33:52,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:33:52,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734166998] [2021-12-18 00:33:52,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:33:52,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917765609] [2021-12-18 00:33:52,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917765609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:33:52,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:33:52,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:33:52,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259416747] [2021-12-18 00:33:52,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:33:52,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:33:52,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:33:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:33:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:33:52,062 INFO L87 Difference]: Start difference. First operand 364 states and 427 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) [2021-12-18 00:33:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:33:52,107 INFO L93 Difference]: Finished difference Result 616 states and 724 transitions. [2021-12-18 00:33:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:33:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) Word has length 239 [2021-12-18 00:33:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:33:52,109 INFO L225 Difference]: With dead ends: 616 [2021-12-18 00:33:52,109 INFO L226 Difference]: Without dead ends: 330 [2021-12-18 00:33:52,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:33:52,111 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 2 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:33:52,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1211 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:33:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-18 00:33:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-12-18 00:33:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 232 states have internal predecessors, (260), 58 states have call successors, (58), 41 states have call predecessors, (58), 43 states have return successors, (64), 56 states have call predecessors, (64), 57 states have call successors, (64) [2021-12-18 00:33:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 382 transitions. [2021-12-18 00:33:52,126 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 382 transitions. Word has length 239 [2021-12-18 00:33:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:33:52,127 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 382 transitions. [2021-12-18 00:33:52,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) [2021-12-18 00:33:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 382 transitions. [2021-12-18 00:33:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-18 00:33:52,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:33:52,129 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:33:52,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 00:33:52,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:52,343 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:33:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:33:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1337628234, now seen corresponding path program 1 times [2021-12-18 00:33:52,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:33:52,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192417249] [2021-12-18 00:33:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:52,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:33:52,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:33:52,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524724700] [2021-12-18 00:33:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:33:52,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:33:52,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:33:52,383 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:33:52,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 00:33:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:33:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 273 conjunts are in the unsatisfiable core [2021-12-18 00:33:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:33:53,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:33:53,720 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:33:53,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:33:53,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:33:54,085 INFO L354 Elim1Store]: treesize reduction 123, result has 21.7 percent of original size [2021-12-18 00:33:54,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 117 treesize of output 130 [2021-12-18 00:33:54,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:33:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:54,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 00:33:54,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 00:33:54,539 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:33:54,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:33:54,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:33:55,101 INFO L354 Elim1Store]: treesize reduction 173, result has 26.4 percent of original size [2021-12-18 00:33:55,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 134 [2021-12-18 00:33:55,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-12-18 00:33:55,518 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-18 00:33:55,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-18 00:33:56,394 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:33:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:33:56,503 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4835 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4835))) (exists ((v_ArrVal_4836 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4836)))) is different from true [2021-12-18 00:33:56,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:33:56,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:33:56,582 INFO L354 Elim1Store]: treesize reduction 62, result has 36.1 percent of original size [2021-12-18 00:33:56,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 95 [2021-12-18 00:33:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:56,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2021-12-18 00:33:56,609 INFO L354 Elim1Store]: treesize reduction 74, result has 33.3 percent of original size [2021-12-18 00:33:56,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 63 [2021-12-18 00:33:56,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:56,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 58 [2021-12-18 00:33:56,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-18 00:33:56,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 54 [2021-12-18 00:33:56,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:33:56,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-12-18 00:33:56,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:33:56,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-12-18 00:33:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:56,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2021-12-18 00:33:56,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:33:56,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-12-18 00:33:59,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:33:59,656 INFO L354 Elim1Store]: treesize reduction 49, result has 47.3 percent of original size [2021-12-18 00:33:59,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 148 treesize of output 138 [2021-12-18 00:34:40,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:34:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:34:40,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:34:40,481 INFO L354 Elim1Store]: treesize reduction 169, result has 46.0 percent of original size [2021-12-18 00:34:40,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 87 treesize of output 160 [2021-12-18 00:34:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 130 proven. 131 refuted. 0 times theorem prover too weak. 30 trivial. 1 not checked. [2021-12-18 00:34:41,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:34:45,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:34:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192417249] [2021-12-18 00:34:45,363 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:34:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524724700] [2021-12-18 00:34:45,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524724700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:34:45,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:34:45,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-12-18 00:34:45,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143570850] [2021-12-18 00:34:45,363 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:34:45,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 00:34:45,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:34:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 00:34:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3315, Unknown=11, NotChecked=116, Total=3660 [2021-12-18 00:34:45,366 INFO L87 Difference]: Start difference. First operand 330 states and 382 transitions. Second operand has 49 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 41 states have internal predecessors, (144), 21 states have call successors, (36), 10 states have call predecessors, (36), 15 states have return successors, (36), 22 states have call predecessors, (36), 19 states have call successors, (36) [2021-12-18 00:34:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:34:59,768 INFO L93 Difference]: Finished difference Result 527 states and 620 transitions. [2021-12-18 00:34:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 00:34:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 41 states have internal predecessors, (144), 21 states have call successors, (36), 10 states have call predecessors, (36), 15 states have return successors, (36), 22 states have call predecessors, (36), 19 states have call successors, (36) Word has length 233 [2021-12-18 00:34:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:34:59,771 INFO L225 Difference]: With dead ends: 527 [2021-12-18 00:34:59,771 INFO L226 Difference]: Without dead ends: 382 [2021-12-18 00:34:59,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 199 SyntacticMatches, 23 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=404, Invalid=6537, Unknown=35, NotChecked=164, Total=7140 [2021-12-18 00:34:59,774 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 192 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1354 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:34:59,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 932 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 414 Invalid, 0 Unknown, 1354 Unchecked, 0.5s Time] [2021-12-18 00:34:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-18 00:34:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 373. [2021-12-18 00:34:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 258 states have (on average 1.1317829457364341) internal successors, (292), 263 states have internal predecessors, (292), 64 states have call successors, (64), 47 states have call predecessors, (64), 50 states have return successors, (73), 62 states have call predecessors, (73), 63 states have call successors, (73) [2021-12-18 00:34:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 429 transitions. [2021-12-18 00:34:59,793 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 429 transitions. Word has length 233 [2021-12-18 00:34:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:34:59,793 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 429 transitions. [2021-12-18 00:34:59,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 41 states have internal predecessors, (144), 21 states have call successors, (36), 10 states have call predecessors, (36), 15 states have return successors, (36), 22 states have call predecessors, (36), 19 states have call successors, (36) [2021-12-18 00:34:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 429 transitions. [2021-12-18 00:34:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-18 00:34:59,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:34:59,795 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:34:59,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 00:35:00,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-18 00:35:00,015 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:35:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:35:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash -47420177, now seen corresponding path program 2 times [2021-12-18 00:35:00,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:35:00,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481089741] [2021-12-18 00:35:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:35:00,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:35:00,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:35:00,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548113197] [2021-12-18 00:35:00,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:35:00,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:35:00,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:35:00,081 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:35:00,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 00:35:01,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:35:01,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:35:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 378 conjunts are in the unsatisfiable core [2021-12-18 00:35:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:35:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:35:01,780 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:35:01,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:35:02,206 INFO L354 Elim1Store]: treesize reduction 173, result has 26.4 percent of original size [2021-12-18 00:35:02,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 134 [2021-12-18 00:35:02,426 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-18 00:35:02,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-18 00:35:02,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-12-18 00:35:02,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:35:02,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-18 00:35:02,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:35:02,846 INFO L354 Elim1Store]: treesize reduction 126, result has 25.9 percent of original size [2021-12-18 00:35:02,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 38 treesize of output 65 [2021-12-18 00:35:03,060 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5152 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5152))) (exists ((v_ArrVal_5150 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5150))) (exists ((v_ArrVal_5151 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5151)))) is different from true [2021-12-18 00:35:03,213 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5153 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5153))) (exists ((v_ArrVal_5154 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5154))) (exists ((v_ArrVal_5155 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5155)))) is different from true [2021-12-18 00:35:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:03,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:35:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:03,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 00:35:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:03,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:03,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-12-18 00:35:03,446 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-12-18 00:35:03,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 36 [2021-12-18 00:35:05,743 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_#Ultimate.C_memset_#t~loopctr1333_16| Int) (v_ArrVal_5157 Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base|) (+ |v_#Ultimate.C_memset_#t~loopctr1333_16| |c_#Ultimate.C_memset_#ptr.offset|) v_ArrVal_5157))) (<= |v_#Ultimate.C_memset_#t~loopctr1333_16| 0) (<= |c_#Ultimate.C_memset_#t~loopctr1333| (+ |v_#Ultimate.C_memset_#t~loopctr1333_16| 1)))) (exists ((v_ArrVal_5156 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5156))) (exists ((v_ArrVal_5159 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5159)))) is different from true [2021-12-18 00:35:05,768 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5163 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5163))) (exists ((v_ArrVal_5160 Int) (|v_#Ultimate.C_memset_#t~loopctr1333_16| Int) (v_ArrVal_5157 Int) (|v_#Ultimate.C_memset_#t~loopctr1333_17| Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| (store (store (select |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base|) (+ |v_#Ultimate.C_memset_#t~loopctr1333_16| |c_#Ultimate.C_memset_#ptr.offset|) v_ArrVal_5157) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr1333_17|) v_ArrVal_5160))) (<= |v_#Ultimate.C_memset_#t~loopctr1333_16| 0) (<= |v_#Ultimate.C_memset_#t~loopctr1333_17| (+ |v_#Ultimate.C_memset_#t~loopctr1333_16| 1)))) (exists ((v_ArrVal_5162 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5162)))) is different from true [2021-12-18 00:35:05,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:05,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:05,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:05,847 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-18 00:35:05,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 64 [2021-12-18 00:35:05,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:35:05,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2021-12-18 00:35:05,887 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:35:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2021-12-18 00:35:05,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-12-18 00:35:05,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-18 00:35:06,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-18 00:35:06,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:06,406 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 00:35:06,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-12-18 00:35:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:06,434 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-18 00:35:06,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 112 [2021-12-18 00:35:06,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:06,694 INFO L354 Elim1Store]: treesize reduction 592, result has 20.1 percent of original size [2021-12-18 00:35:06,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 137 treesize of output 261 [2021-12-18 00:35:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:08,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:08,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:08,658 INFO L354 Elim1Store]: treesize reduction 64, result has 45.3 percent of original size [2021-12-18 00:35:08,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 251 treesize of output 249 [2021-12-18 00:35:25,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:25,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:25,253 INFO L354 Elim1Store]: treesize reduction 152, result has 27.3 percent of original size [2021-12-18 00:35:25,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 154 treesize of output 132 [2021-12-18 00:35:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 107 proven. 172 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2021-12-18 00:35:25,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:35:29,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:35:29,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481089741] [2021-12-18 00:35:29,049 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:35:29,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548113197] [2021-12-18 00:35:29,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548113197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:35:29,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:35:29,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2021-12-18 00:35:29,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911190108] [2021-12-18 00:35:29,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:35:29,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 00:35:29,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:35:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 00:35:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=5403, Unknown=38, NotChecked=604, Total=6320 [2021-12-18 00:35:29,052 INFO L87 Difference]: Start difference. First operand 373 states and 429 transitions. Second operand has 67 states, 54 states have (on average 2.888888888888889) internal successors, (156), 55 states have internal predecessors, (156), 25 states have call successors, (39), 12 states have call predecessors, (39), 21 states have return successors, (36), 25 states have call predecessors, (36), 24 states have call successors, (36) [2021-12-18 00:35:29,411 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5152 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5152))) (exists ((v_ArrVal_5150 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5150))) (exists ((|v___CPROVER_overflow_mult_~#c~1.base_232| Int) (v_ArrVal_5132 Int)) (and (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_232| v_ArrVal_5132)) (= 0 (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_232|)))) (exists ((v_ArrVal_5151 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5151)))) is different from true [2021-12-18 00:35:29,600 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5153 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5153))) (exists ((v_ArrVal_5154 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5154))) (exists ((v_ArrVal_5155 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5155))) (exists ((|v___CPROVER_overflow_mult_~#c~1.base_232| Int) (v_ArrVal_5132 Int)) (and (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_232| v_ArrVal_5132)) (= 0 (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_232|))))) is different from true [2021-12-18 00:35:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:35:39,825 INFO L93 Difference]: Finished difference Result 567 states and 664 transitions. [2021-12-18 00:35:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-18 00:35:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 54 states have (on average 2.888888888888889) internal successors, (156), 55 states have internal predecessors, (156), 25 states have call successors, (39), 12 states have call predecessors, (39), 21 states have return successors, (36), 25 states have call predecessors, (36), 24 states have call successors, (36) Word has length 234 [2021-12-18 00:35:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:35:39,827 INFO L225 Difference]: With dead ends: 567 [2021-12-18 00:35:39,827 INFO L226 Difference]: Without dead ends: 422 [2021-12-18 00:35:39,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 195 SyntacticMatches, 18 SemanticMatches, 123 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 4548 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=626, Invalid=13333, Unknown=107, NotChecked=1434, Total=15500 [2021-12-18 00:35:39,830 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 211 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 6775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5588 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:35:39,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 2037 Invalid, 6775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1077 Invalid, 0 Unknown, 5588 Unchecked, 1.5s Time] [2021-12-18 00:35:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-18 00:35:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 374. [2021-12-18 00:35:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 259 states have (on average 1.135135135135135) internal successors, (294), 264 states have internal predecessors, (294), 64 states have call successors, (64), 47 states have call predecessors, (64), 50 states have return successors, (73), 62 states have call predecessors, (73), 63 states have call successors, (73) [2021-12-18 00:35:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 431 transitions. [2021-12-18 00:35:39,860 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 431 transitions. Word has length 234 [2021-12-18 00:35:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:35:39,860 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 431 transitions. [2021-12-18 00:35:39,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 54 states have (on average 2.888888888888889) internal successors, (156), 55 states have internal predecessors, (156), 25 states have call successors, (39), 12 states have call predecessors, (39), 21 states have return successors, (36), 25 states have call predecessors, (36), 24 states have call successors, (36) [2021-12-18 00:35:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 431 transitions. [2021-12-18 00:35:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-18 00:35:39,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:35:39,862 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:35:39,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 00:35:40,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-18 00:35:40,075 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:35:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:35:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1820976807, now seen corresponding path program 1 times [2021-12-18 00:35:40,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:35:40,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045537463] [2021-12-18 00:35:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:35:40,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:35:40,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:35:40,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69086566] [2021-12-18 00:35:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:35:40,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:35:40,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:35:40,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:35:40,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 00:35:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:35:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 436 conjunts are in the unsatisfiable core [2021-12-18 00:35:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:35:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:35:43,914 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:35:43,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:35:43,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:35:44,391 INFO L354 Elim1Store]: treesize reduction 203, result has 13.6 percent of original size [2021-12-18 00:35:44,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 78 [2021-12-18 00:35:44,936 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:35:44,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:35:45,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:45,037 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-18 00:35:45,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 34 [2021-12-18 00:35:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:35:45,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 00:35:45,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:35:45,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-12-18 00:35:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:45,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-18 00:35:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:46,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:46,289 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:35:46,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 49 [2021-12-18 00:35:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-12-18 00:35:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:46,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-18 00:35:46,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-18 00:35:46,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 00:35:46,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:35:46,779 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5485 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5485))) (exists ((v_ArrVal_5483 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5483))) (exists ((|v___CPROVER_overflow_mult_~#c~1.base_238| Int)) (and (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_238| 0)) (= 0 (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_238|)))) (exists ((v_ArrVal_5484 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5484)))) is different from true [2021-12-18 00:35:46,968 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 00:35:46,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 00:35:47,150 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5487 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5487))) (exists ((v_ArrVal_5488 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5488))) (exists ((|v___CPROVER_overflow_mult_~#c~1.base_238| Int)) (and (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_238| 0)) (= 0 (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_238|)))) (exists ((v_ArrVal_5489 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5489)))) is different from true [2021-12-18 00:35:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:47,872 INFO L354 Elim1Store]: treesize reduction 274, result has 16.0 percent of original size [2021-12-18 00:35:47,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 94 treesize of output 119 [2021-12-18 00:35:47,911 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:35:47,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 25 [2021-12-18 00:35:47,938 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:35:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2021-12-18 00:35:47,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:47,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:47,964 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:35:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-12-18 00:35:49,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:35:49,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:49,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-18 00:35:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-12-18 00:35:49,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-12-18 00:35:49,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:35:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:49,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-18 00:35:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:50,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:50,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-12-18 00:35:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:50,410 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-12-18 00:35:50,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2021-12-18 00:35:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:35:58,490 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:35:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 21 [2021-12-18 00:35:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 229 proven. 51 refuted. 0 times theorem prover too weak. 41 trivial. 6 not checked. [2021-12-18 00:35:58,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:35:59,583 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5505 (Array Int Int))) (< 0 (mod (select (select (store |c_#memory_int| |c_aws_hash_iter_begin_~#iter~1.base| v_ArrVal_5505) c_aws_hash_iter_begin_~state~11.base) (+ c_aws_hash_iter_begin_~state~11.offset 40)) 18446744073709551616))) is different from false [2021-12-18 00:36:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-18 00:36:01,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:36:01,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045537463] [2021-12-18 00:36:01,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:36:01,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69086566] [2021-12-18 00:36:01,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69086566] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 00:36:01,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:36:01,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [49] total 56 [2021-12-18 00:36:01,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099974593] [2021-12-18 00:36:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:36:01,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:36:01,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:36:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:36:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2541, Unknown=21, NotChecked=312, Total=3080 [2021-12-18 00:36:01,021 INFO L87 Difference]: Start difference. First operand 374 states and 431 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 4 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-12-18 00:36:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:36:01,431 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2021-12-18 00:36:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 00:36:01,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 4 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 239 [2021-12-18 00:36:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:36:01,433 INFO L225 Difference]: With dead ends: 515 [2021-12-18 00:36:01,434 INFO L226 Difference]: Without dead ends: 357 [2021-12-18 00:36:01,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 403 SyntacticMatches, 19 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=216, Invalid=2745, Unknown=21, NotChecked=324, Total=3306 [2021-12-18 00:36:01,435 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 8 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:36:01,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1354 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2021-12-18 00:36:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-18 00:36:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 355. [2021-12-18 00:36:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 248 states have (on average 1.1370967741935485) internal successors, (282), 252 states have internal predecessors, (282), 58 states have call successors, (58), 46 states have call predecessors, (58), 48 states have return successors, (66), 56 states have call predecessors, (66), 57 states have call successors, (66) [2021-12-18 00:36:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 406 transitions. [2021-12-18 00:36:01,457 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 406 transitions. Word has length 239 [2021-12-18 00:36:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:36:01,458 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 406 transitions. [2021-12-18 00:36:01,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 4 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-12-18 00:36:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 406 transitions. [2021-12-18 00:36:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-18 00:36:01,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:36:01,460 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:36:01,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-18 00:36:01,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:36:01,671 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:36:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:36:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1269201722, now seen corresponding path program 1 times [2021-12-18 00:36:01,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:36:01,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757120994] [2021-12-18 00:36:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:36:01,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:36:01,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:36:01,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328067127] [2021-12-18 00:36:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:36:01,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:36:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:36:01,717 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:36:01,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 00:36:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:36:04,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:36:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:36:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 134 proven. 1 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-18 00:36:04,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:36:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-12-18 00:36:04,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:36:04,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757120994] [2021-12-18 00:36:04,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:36:04,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328067127] [2021-12-18 00:36:04,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328067127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:36:04,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:36:04,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 00:36:04,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546967012] [2021-12-18 00:36:04,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:36:04,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:36:04,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:36:04,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:36:04,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:36:04,687 INFO L87 Difference]: Start difference. First operand 355 states and 406 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-12-18 00:36:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:36:04,753 INFO L93 Difference]: Finished difference Result 530 states and 621 transitions. [2021-12-18 00:36:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:36:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 236 [2021-12-18 00:36:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:36:04,757 INFO L225 Difference]: With dead ends: 530 [2021-12-18 00:36:04,757 INFO L226 Difference]: Without dead ends: 314 [2021-12-18 00:36:04,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:36:04,758 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 9 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:36:04,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 774 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:36:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-18 00:36:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-12-18 00:36:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 219 states have (on average 1.1415525114155252) internal successors, (250), 222 states have internal predecessors, (250), 51 states have call successors, (51), 40 states have call predecessors, (51), 41 states have return successors, (56), 49 states have call predecessors, (56), 50 states have call successors, (56) [2021-12-18 00:36:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 357 transitions. [2021-12-18 00:36:04,774 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 357 transitions. Word has length 236 [2021-12-18 00:36:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:36:04,775 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 357 transitions. [2021-12-18 00:36:04,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-12-18 00:36:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 357 transitions. [2021-12-18 00:36:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-18 00:36:04,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:36:04,777 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:36:04,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 00:36:04,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:36:04,994 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:36:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:36:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1446832615, now seen corresponding path program 1 times [2021-12-18 00:36:04,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:36:04,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246760641] [2021-12-18 00:36:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:36:04,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:36:05,039 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:36:05,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175064495] [2021-12-18 00:36:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:36:05,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:36:05,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:36:05,041 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:36:05,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 00:36:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:36:06,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 339 conjunts are in the unsatisfiable core [2021-12-18 00:36:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:36:06,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:36:06,416 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:36:06,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:36:06,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:36:06,895 INFO L354 Elim1Store]: treesize reduction 112, result has 28.7 percent of original size [2021-12-18 00:36:06,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 142 treesize of output 166 [2021-12-18 00:36:07,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:36:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:07,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 00:36:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:36:07,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:07,369 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:36:07,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-12-18 00:36:07,588 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 00:36:07,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:36:07,718 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:36:07,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:36:08,221 INFO L354 Elim1Store]: treesize reduction 173, result has 26.4 percent of original size [2021-12-18 00:36:08,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 186 [2021-12-18 00:36:08,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:36:08,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-12-18 00:36:08,829 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-18 00:36:08,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-18 00:36:09,529 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:36:09,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:36:09,644 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6223 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6223))) (exists ((v_ArrVal_6222 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6222)))) is different from true [2021-12-18 00:36:09,650 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6225 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6225))) (exists ((v_ArrVal_6224 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6224)))) is different from true [2021-12-18 00:36:09,656 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6226 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6226))) (exists ((v_ArrVal_6227 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6227)))) is different from true [2021-12-18 00:36:09,663 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6228 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6228))) (exists ((v_ArrVal_6229 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6229)))) is different from true [2021-12-18 00:36:09,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:36:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:36:09,767 INFO L354 Elim1Store]: treesize reduction 62, result has 36.1 percent of original size [2021-12-18 00:36:09,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 95 [2021-12-18 00:36:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:09,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2021-12-18 00:36:09,805 INFO L354 Elim1Store]: treesize reduction 74, result has 33.3 percent of original size [2021-12-18 00:36:09,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 63 [2021-12-18 00:36:09,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:09,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 58 [2021-12-18 00:36:09,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-18 00:36:09,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-12-18 00:36:09,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 89 [2021-12-18 00:36:09,895 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:36:09,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 35 [2021-12-18 00:36:26,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:36:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:36:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:36:26,735 INFO L354 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2021-12-18 00:36:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 49 [2021-12-18 00:36:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 102 proven. 181 refuted. 0 times theorem prover too weak. 44 trivial. 10 not checked. [2021-12-18 00:36:26,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:36:30,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:36:30,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246760641] [2021-12-18 00:36:30,392 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:36:30,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175064495] [2021-12-18 00:36:30,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175064495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:36:30,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:36:30,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2021-12-18 00:36:30,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608390814] [2021-12-18 00:36:30,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:36:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 00:36:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:36:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 00:36:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3926, Unknown=6, NotChecked=516, Total=4692 [2021-12-18 00:36:30,395 INFO L87 Difference]: Start difference. First operand 312 states and 357 transitions. Second operand has 57 states, 49 states have (on average 2.877551020408163) internal successors, (141), 49 states have internal predecessors, (141), 24 states have call successors, (36), 11 states have call predecessors, (36), 16 states have return successors, (33), 21 states have call predecessors, (33), 22 states have call successors, (33) [2021-12-18 00:36:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:36:34,134 INFO L93 Difference]: Finished difference Result 536 states and 619 transitions. [2021-12-18 00:36:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-18 00:36:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 49 states have (on average 2.877551020408163) internal successors, (141), 49 states have internal predecessors, (141), 24 states have call successors, (36), 11 states have call predecessors, (36), 16 states have return successors, (33), 21 states have call predecessors, (33), 22 states have call successors, (33) Word has length 243 [2021-12-18 00:36:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:36:34,137 INFO L225 Difference]: With dead ends: 536 [2021-12-18 00:36:34,137 INFO L226 Difference]: Without dead ends: 388 [2021-12-18 00:36:34,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 195 SyntacticMatches, 31 SemanticMatches, 90 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=415, Invalid=7232, Unknown=25, NotChecked=700, Total=8372 [2021-12-18 00:36:34,139 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 194 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3083 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:36:34,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 2067 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 932 Invalid, 0 Unknown, 3083 Unchecked, 1.5s Time] [2021-12-18 00:36:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-18 00:36:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 374. [2021-12-18 00:36:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 263 states have (on average 1.1254752851711027) internal successors, (296), 266 states have internal predecessors, (296), 59 states have call successors, (59), 50 states have call predecessors, (59), 51 states have return successors, (64), 57 states have call predecessors, (64), 58 states have call successors, (64) [2021-12-18 00:36:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 419 transitions. [2021-12-18 00:36:34,182 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 419 transitions. Word has length 243 [2021-12-18 00:36:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:36:34,182 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 419 transitions. [2021-12-18 00:36:34,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 49 states have (on average 2.877551020408163) internal successors, (141), 49 states have internal predecessors, (141), 24 states have call successors, (36), 11 states have call predecessors, (36), 16 states have return successors, (33), 21 states have call predecessors, (33), 22 states have call successors, (33) [2021-12-18 00:36:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 419 transitions. [2021-12-18 00:36:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-18 00:36:34,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:36:34,185 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:36:34,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 00:36:34,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 00:36:34,407 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:36:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:36:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash -979279347, now seen corresponding path program 2 times [2021-12-18 00:36:34,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:36:34,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426097433] [2021-12-18 00:36:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:36:34,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:36:34,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:36:34,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593919430] [2021-12-18 00:36:34,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:36:34,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:36:34,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:36:34,450 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:36:34,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 00:36:35,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:36:35,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:36:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 300 conjunts are in the unsatisfiable core [2021-12-18 00:36:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:36:35,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:36:36,273 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:36:36,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:36:36,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:36:36,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:36:36,489 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 00:36:36,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 00:36:42,099 INFO L354 Elim1Store]: treesize reduction 173, result has 26.4 percent of original size [2021-12-18 00:36:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 134 [2021-12-18 00:36:42,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:36:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:42,454 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:36:42,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-12-18 00:36:42,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 00:36:42,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:36:42,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-12-18 00:36:42,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:36:42,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:36:45,165 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:36:45,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:36:45,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-18 00:36:45,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 5 [2021-12-18 00:36:45,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 00:36:45,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:36:45,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:36:45,728 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6581 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_6581))) (exists ((v_ArrVal_6582 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_6582))) (exists ((v_ArrVal_6583 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_6583)))) is different from true [2021-12-18 00:36:45,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:36:46,011 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6585 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_6585))) (exists ((v_ArrVal_6586 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_6586))) (exists ((v_ArrVal_6584 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_6584)))) is different from true [2021-12-18 00:36:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:46,291 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:36:46,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:36:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:46,319 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:36:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2021-12-18 00:36:46,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:46,347 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:36:46,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 42 [2021-12-18 00:36:46,375 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:36:46,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:36:48,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-12-18 00:36:48,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-18 00:36:49,302 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6588 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6588))) is different from true [2021-12-18 00:36:49,305 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6589 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6589))) is different from true [2021-12-18 00:36:49,309 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6590 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_6590))) is different from true [2021-12-18 00:36:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:49,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:36:49,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:36:49,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-12-18 00:36:49,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-12-18 00:36:51,018 WARN L860 $PredicateComparison]: unable to prove that (exists ((aws_hash_iter_begin_~state~11.base Int) (v_s_get_next_element_~iter.base_BEFORE_CALL_61 Int)) (let ((.cse0 (select (select |c_#memory_int| aws_hash_iter_begin_~state~11.base) 40))) (and (<= 2 (mod .cse0 18446744073709551616)) (= (select (select |c_#memory_int| v_s_get_next_element_~iter.base_BEFORE_CALL_61) 32) .cse0) (< (+ aws_hash_iter_begin_~state~11.base 1) v_s_get_next_element_~iter.base_BEFORE_CALL_61)))) is different from true [2021-12-18 00:37:18,269 WARN L860 $PredicateComparison]: unable to prove that (exists ((aws_hash_iter_begin_~state~11.base Int) (v_s_get_next_element_~iter.base_BEFORE_CALL_63 Int)) (let ((.cse0 (select (select |c_#memory_int| aws_hash_iter_begin_~state~11.base) 40))) (and (<= 2 (mod .cse0 18446744073709551616)) (= (select (select |c_#memory_int| v_s_get_next_element_~iter.base_BEFORE_CALL_63) 32) .cse0) (< (+ aws_hash_iter_begin_~state~11.base 1) v_s_get_next_element_~iter.base_BEFORE_CALL_63)))) is different from true [2021-12-18 00:37:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:37:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-12-18 00:37:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 97 proven. 130 refuted. 0 times theorem prover too weak. 8 trivial. 67 not checked. [2021-12-18 00:37:20,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:37:23,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6592 (Array Int Int))) (< 1 (mod (select (select (store |c_#memory_int| |c_aws_hash_iter_begin_~#iter~1.base| v_ArrVal_6592) c_aws_hash_iter_begin_~state~11.base) (+ c_aws_hash_iter_begin_~state~11.offset 40)) 18446744073709551616))) is different from false [2021-12-18 00:37:23,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:37:23,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426097433] [2021-12-18 00:37:23,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:37:23,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593919430] [2021-12-18 00:37:23,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593919430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:37:23,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:37:23,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2021-12-18 00:37:23,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365751878] [2021-12-18 00:37:23,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:37:23,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 00:37:23,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:37:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 00:37:23,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3200, Unknown=42, NotChecked=968, Total=4422 [2021-12-18 00:37:23,363 INFO L87 Difference]: Start difference. First operand 374 states and 419 transitions. Second operand has 61 states, 53 states have (on average 2.981132075471698) internal successors, (158), 51 states have internal predecessors, (158), 24 states have call successors, (39), 15 states have call predecessors, (39), 19 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2021-12-18 00:38:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:38:08,706 INFO L93 Difference]: Finished difference Result 568 states and 653 transitions. [2021-12-18 00:38:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-18 00:38:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 53 states have (on average 2.981132075471698) internal successors, (158), 51 states have internal predecessors, (158), 24 states have call successors, (39), 15 states have call predecessors, (39), 19 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) Word has length 239 [2021-12-18 00:38:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:38:08,710 INFO L225 Difference]: With dead ends: 568 [2021-12-18 00:38:08,710 INFO L226 Difference]: Without dead ends: 426 [2021-12-18 00:38:08,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 228 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 2645 ImplicationChecksByTransitivity, 86.3s TimeCoverageRelationStatistics Valid=411, Invalid=7188, Unknown=89, NotChecked=1432, Total=9120 [2021-12-18 00:38:08,712 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 318 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 6493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4861 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:38:08,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1750 Invalid, 6493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1428 Invalid, 0 Unknown, 4861 Unchecked, 2.2s Time] [2021-12-18 00:38:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-18 00:38:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 419. [2021-12-18 00:38:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 295 states have (on average 1.11864406779661) internal successors, (330), 298 states have internal predecessors, (330), 66 states have call successors, (66), 56 states have call predecessors, (66), 57 states have return successors, (73), 64 states have call predecessors, (73), 65 states have call successors, (73) [2021-12-18 00:38:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 469 transitions. [2021-12-18 00:38:08,735 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 469 transitions. Word has length 239 [2021-12-18 00:38:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:38:08,736 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 469 transitions. [2021-12-18 00:38:08,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 53 states have (on average 2.981132075471698) internal successors, (158), 51 states have internal predecessors, (158), 24 states have call successors, (39), 15 states have call predecessors, (39), 19 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2021-12-18 00:38:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 469 transitions. [2021-12-18 00:38:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-18 00:38:08,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:38:08,738 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:38:08,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 00:38:08,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 00:38:08,951 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:38:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:38:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1008294275, now seen corresponding path program 1 times [2021-12-18 00:38:08,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:38:08,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920723390] [2021-12-18 00:38:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:38:08,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:38:09,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:38:09,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576148922] [2021-12-18 00:38:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:38:09,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:38:09,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:38:09,007 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:38:09,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 00:38:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:38:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 00:38:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:38:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 142 proven. 10 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-18 00:38:10,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:38:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-12-18 00:38:11,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:38:11,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920723390] [2021-12-18 00:38:11,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:38:11,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576148922] [2021-12-18 00:38:11,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576148922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:38:11,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:38:11,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-18 00:38:11,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067466513] [2021-12-18 00:38:11,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:38:11,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 00:38:11,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:38:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 00:38:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:38:11,317 INFO L87 Difference]: Start difference. First operand 419 states and 469 transitions. Second operand has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-12-18 00:38:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:38:11,887 INFO L93 Difference]: Finished difference Result 593 states and 685 transitions. [2021-12-18 00:38:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 00:38:11,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 246 [2021-12-18 00:38:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:38:11,889 INFO L225 Difference]: With dead ends: 593 [2021-12-18 00:38:11,890 INFO L226 Difference]: Without dead ends: 339 [2021-12-18 00:38:11,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-18 00:38:11,891 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 33 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:38:11,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1155 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:38:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-18 00:38:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2021-12-18 00:38:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 239 states have (on average 1.1297071129707112) internal successors, (270), 241 states have internal predecessors, (270), 53 states have call successors, (53), 44 states have call predecessors, (53), 44 states have return successors, (56), 51 states have call predecessors, (56), 52 states have call successors, (56) [2021-12-18 00:38:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 379 transitions. [2021-12-18 00:38:11,916 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 379 transitions. Word has length 246 [2021-12-18 00:38:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:38:11,917 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 379 transitions. [2021-12-18 00:38:11,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.928571428571429) internal successors, (111), 14 states have internal predecessors, (111), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-12-18 00:38:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 379 transitions. [2021-12-18 00:38:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-18 00:38:11,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:38:11,919 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:38:11,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-18 00:38:12,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 00:38:12,135 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:38:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:38:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1513512249, now seen corresponding path program 2 times [2021-12-18 00:38:12,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:38:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21186056] [2021-12-18 00:38:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:38:12,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:38:12,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:38:12,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451456247] [2021-12-18 00:38:12,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:38:12,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:38:12,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:38:12,181 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:38:12,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 00:38:13,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:38:13,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:38:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 221 conjunts are in the unsatisfiable core [2021-12-18 00:38:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:38:14,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 00:38:14,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-12-18 00:38:14,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-12-18 00:38:14,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2021-12-18 00:38:14,081 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_13 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_arrayElimArr_13)) (= (select v_arrayElimArr_13 (+ |c_#Ultimate.C_memset_#ptr.offset| 8)) 0))) (exists ((v_arrayElimArr_12 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_arrayElimArr_12)) (= (select v_arrayElimArr_12 (+ |c_#Ultimate.C_memset_#ptr.offset| 8)) (mod |c_#Ultimate.C_memset_#value| 256))))) is different from true [2021-12-18 00:38:14,119 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:38:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-18 00:38:14,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:38:14,141 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:38:14,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-18 00:38:14,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 00:38:14,273 INFO L354 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2021-12-18 00:38:14,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 63 [2021-12-18 00:38:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,298 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 00:38:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 47 [2021-12-18 00:38:14,333 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-12-18 00:38:14,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 47 [2021-12-18 00:38:14,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:14,353 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-18 00:38:14,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 59 [2021-12-18 00:38:14,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:38:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-12-18 00:38:14,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:38:14,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2021-12-18 00:38:14,656 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 00:38:14,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-12-18 00:38:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:38:29,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:38:29,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:38:29,541 INFO L354 Elim1Store]: treesize reduction 86, result has 28.9 percent of original size [2021-12-18 00:38:29,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 49 [2021-12-18 00:38:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 163 proven. 45 refuted. 0 times theorem prover too weak. 164 trivial. 10 not checked. [2021-12-18 00:38:29,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:38:56,704 WARN L227 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:38:56,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:38:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21186056] [2021-12-18 00:38:56,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 00:38:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451456247] [2021-12-18 00:38:56,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451456247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:38:56,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:38:56,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-12-18 00:38:56,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236545381] [2021-12-18 00:38:56,770 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:38:56,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 00:38:56,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:38:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 00:38:56,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2306, Unknown=3, NotChecked=96, Total=2550 [2021-12-18 00:38:56,772 INFO L87 Difference]: Start difference. First operand 337 states and 379 transitions. Second operand has 39 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 32 states have internal predecessors, (118), 12 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-12-18 00:38:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:38:59,933 INFO L93 Difference]: Finished difference Result 521 states and 600 transitions. [2021-12-18 00:38:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 00:38:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 32 states have internal predecessors, (118), 12 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) Word has length 249 [2021-12-18 00:38:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:38:59,935 INFO L225 Difference]: With dead ends: 521 [2021-12-18 00:38:59,935 INFO L226 Difference]: Without dead ends: 379 [2021-12-18 00:38:59,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=179, Invalid=2792, Unknown=3, NotChecked=106, Total=3080 [2021-12-18 00:38:59,937 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 102 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 3487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2642 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:38:59,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1835 Invalid, 3487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 796 Invalid, 0 Unknown, 2642 Unchecked, 1.0s Time] [2021-12-18 00:38:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-18 00:38:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2021-12-18 00:38:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 267 states have (on average 1.1198501872659177) internal successors, (299), 269 states have internal predecessors, (299), 59 states have call successors, (59), 50 states have call predecessors, (59), 50 states have return successors, (63), 57 states have call predecessors, (63), 58 states have call successors, (63) [2021-12-18 00:38:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 421 transitions. [2021-12-18 00:38:59,958 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 421 transitions. Word has length 249 [2021-12-18 00:38:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:38:59,959 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 421 transitions. [2021-12-18 00:38:59,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 32 states have internal predecessors, (118), 12 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-12-18 00:38:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 421 transitions. [2021-12-18 00:38:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-18 00:38:59,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:38:59,961 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:38:59,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 00:39:00,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 00:39:00,178 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:39:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:39:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash -325503123, now seen corresponding path program 3 times [2021-12-18 00:39:00,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:39:00,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406362931] [2021-12-18 00:39:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:39:00,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:39:00,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 00:39:00,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597048577] [2021-12-18 00:39:00,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 00:39:00,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:39:00,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:39:00,226 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:39:00,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 00:41:02,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 00:41:02,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:41:02,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 2871 conjuncts, 197 conjunts are in the unsatisfiable core [2021-12-18 00:41:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:41:02,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 00:41:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:41:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:41:02,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-12-18 00:41:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:41:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:41:04,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2021-12-18 00:41:04,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 00:41:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-12-18 00:41:04,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:41:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 00:41:04,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:41:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-12-18 00:41:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 151 proven. 59 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-18 00:41:05,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:41:06,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-18 00:41:06,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-18 00:41:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-12-18 00:41:07,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-18 00:41:08,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-18 00:41:08,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:41:08,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 53 [2021-12-18 00:41:08,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:41:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:41:08,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:41:08,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:41:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-12-18 00:41:08,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 Killed by 15